Sanitization/Validation Helper Class

gistfile1.txt

<?php

class CFO_Sanitize {

	public static function sanitize_array( $fields, $data ) {

		$clean_data = array();

		foreach ( $fields as $field ) {

			if ( ! isset( $field[ 'sanitize_callback' ] ) ) {
				continue;
			}

			if ( isset( $data[ $field['node'] ] ) ) {

				$dirty_value = $data[ $field['node'] ];

				if ( isset( $field['parse_callback'] ) ) {
					$dirty_value = call_user_func( $field['parse_callback'], $dirty_value );
				}

				$clean_data[ $field['node'] ] = call_user_func( $field['sanitize_callback'], $dirty_value );

			} elseif ( array_key_exists( 'default', $field ) ) {

				$clean_data[ $field['node'] ] = $field['default'];

			}

		}

		return $clean_data;

	}

	protected static function sanitize_numeric_array( $data ) {
		return array_map( 'absint', $data );
	}

}


$raw_data = array(
	'test1' => '<script>alert(\'bad_data\');</script>',
	'test2' => 'Good Data',
	'test3' => 'Invalid Data',
	'test4' => 'matthew@matth.com',
	'test5' => 'matthew at matth . eu',
	'test7' => array( 1, 'test' ),
);

$field_data = array(
	array(
		'node'              => 'test1',
		'sanitize_callback' => 'sanitize_text_field',
	),
	array(
		'node'              => 'test2',
		'sanitize_callback' => 'sanitize_text_field',
	),
	array(
		'node'              => 'test4',
		'sanitize_callback' => 'sanitize_email',
	),
	array(
		'node'              => 'test5',
		'sanitize_callback' => 'sanitize_email',
	),
	array(
		'node'              => 'test6',
		'sanitize_callback' => 'sanitize_text_field',
		'default'           => __( 'Recommended from CFO.com' ),
	),
	array(
		'node'              => 'test7',
		'sanitize_callback' => array( 'CFO_Sanitize', 'sanitize_numeric_array' ),
		'default'           => __( 'Recommended from CFO.com' ),
	),
);

hm( CFO_Sanitize::sanitize_array( $field_data, $raw_data ) );